Hi Nick, I spotted Mistral at Pin Mill earlier this year and I am the owner of Pindara which is moored near the buoy where I saw Mistral. I have a 7Kg Bruce anchor and I am very happy about it, I never dragged in the sand or mud. Also it does not seem to bounce at sea and I am not worried about it as it is all packed up once the chain and rope is inside, but I never sail at sea when the forecast predicts more than 1.5m of waves.
Anyway, if you are moored near Pin Mill I would be more than happy to show you how I fit the Anchor in the locker, always nice to meet the owner of a Super Seal!
Cheers
Arthur